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From Pathfinder Treasure Vault (Remastered), which isn't enabled.

Librarian Staff (Greater)

ITEM 12
EXTRADIMENSIONALMAGICALSTAFFTWO-HAND-D8
Price 1750 gp
Usage held in 1 hand
Bulk 1
Category simple
Group club
Damage 1d4 bludgeoning

A librarian staff is a slender pole composed of thousands of coiled and compressed book pages swirling into one another, with a mishmash of letters tumbling across its surface. The sound of rustling pages can be heard when the staff moves.

Activate (concentrate, manipulate)
Effect You store one portable text of 1 Bulk or less—typically a book or scroll—in an extradimensional space in the staff. You can also use this activation to retrieve one text stored in the staff. The staff can store up to 100 texts.
Activate Cast a Spell
Effect You expend a number of charges from the staff to cast a spell from its list.
Craft Requirements Supply one casting of all listed ranks of all listed spells.
Pathfinder Treasure Vault (Remastered)ORC